UWS CONSTRUCTION PORN: Official Zoning Diagrams For 226 W. 71st Penthouse Extension

(Click for full-size) I’ve previously posted a couple of photos of the modern penthouse addition to the townhouse at 226 W. 71st (here & here). Since then, my curiosity about the project has gotten the better of me and I managed to dig up two sets of official zoning diagrams that show some additional details.